"Il faut cent fois plus d'esprit pour faire l'amour, que pour commander les armees".
"It takes a hundered times more intelligence to make love than it does to command an army".

-- the famous/infamous Madame Ninon de Lenclos, who ran a 17th century Parisian salon. Her most famous words were said to be, "Ah! Le bon billet qu'a La Châtre!" (Ah, my promise to La Châtre) which she used to say whenever she was in the throes of passion -- The Marquis de la Châtre was her official lover, and when he left Paris with the army, he made her sign a written promise (un billet) that she would be faithful to him while he was away; which she notoriously wasn't.